Bad Wolf

The three TARDIS travellers find themselves separated, waking up with temporary amnesia in various reality television and game shows. The Doctor finds himself in a Big Brother house hosted by the "Davinadroid", Rose on the set of The Weakest Link hosted by the "Anne Droid", and Jack facing two gynoids, Trine-e and Zu-Zana who offer to give him a brand new image, à la What Not to Wear.
All three find out that the shows are more fatal than their twenty-first century counterparts. On The Weakest Link and Big Brother, losing contestants are seemingly disintegrated, while on What Not to Wear, participants undergo major cosmetic surgery. Jack and the Doctor escape from their shows, the Doctor bringing along a contestant called Lynda, and find themselves on Satellite Five, which the Doctor previously visited in "The Long Game", now under the control of the Badwolf Corporation.
Lynda is instrumental in explaining gaps in the narrative. She explains to the Doctor that a hundred years previous to the episode's narrative, the satellite's broadcasts suddenly stopped, and as a result, progress on Earth halted. The Doctor realises that he himself was responsible for the change.The Doctor, Jack, and Lynda progress to find Rose. They find her as she loses in the final round of The Weakest Link, and is promptly disintegrated. They are arrested, but escape their capture and travel to the control room on Floor 500. They meet the Controller, a cybernetic human, who obliquely tells the Doctor that contest losers are not disintegrated, but transmatted to an empty point in space. The Doctor and Jack discover, to their horror, hundreds of ships containing 400,000 Daleks between them. Detected, the Daleks open a communication channel to the Doctor, who resolves to rescue Rose and then purge the Dalek race once and for all. In response, the Daleks' last action before the episode ends is to start invading Earth.